A controversial new documentary about the Mormon church's role in the passage of California's Proposition 8 recently premiered last weekend at the Sundance Film Festival.

Using internal church documents and recordings of Mormon officials, and interviews with gay activists, political figures and former members of the church, Greenstreet and his fellow director, Miami journalist Reed Cowan, make the case that the church overstepped its bounds as a nonprofit, religious organization to ensure that Prop 8 passed. But the movie doesn't just focus on that single piece of legislation.

"8" also explores the broader impact of what the filmmakers describe as the church's historically intolerant attitude toward gays, using tales of suicide attempts by young Mormons struggling with their sexual orientations and men still grappling with memories of the shock treatments they endured in order to "cure" them of their homosexuality.

View the trailer here or read more news commentary from the Washington Post on in it here.